// https://syzkaller.appspot.com/bug?id=ee595bf9e099fff0610828e37bbbcdb7a2933f58 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_io_uring_register #define __NR_io_uring_register 427 #endif #ifndef __NR_io_uring_setup #define __NR_io_uring_setup 425 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; static __thread int clone_ongoing; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) { exit(sig); } uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (skip && valid) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_handler = SIG_IGN; syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) \ ({ \ int ok = 1; \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } else \ ok = 0; \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ ok; \ }) static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } #define SIZEOF_IO_URING_SQE 64 #define SIZEOF_IO_URING_CQE 16 #define SQ_HEAD_OFFSET 0 #define SQ_TAIL_OFFSET 64 #define SQ_RING_MASK_OFFSET 256 #define SQ_RING_ENTRIES_OFFSET 264 #define SQ_FLAGS_OFFSET 276 #define SQ_DROPPED_OFFSET 272 #define CQ_HEAD_OFFSET 128 #define CQ_TAIL_OFFSET 192 #define CQ_RING_MASK_OFFSET 260 #define CQ_RING_ENTRIES_OFFSET 268 #define CQ_RING_OVERFLOW_OFFSET 284 #define CQ_FLAGS_OFFSET 280 #define CQ_CQES_OFFSET 320 struct io_sqring_offsets { uint32_t head; uint32_t tail; uint32_t ring_mask; uint32_t ring_entries; uint32_t flags; uint32_t dropped; uint32_t array; uint32_t resv1; uint64_t resv2; }; struct io_cqring_offsets { uint32_t head; uint32_t tail; uint32_t ring_mask; uint32_t ring_entries; uint32_t overflow; uint32_t cqes; uint64_t resv[2]; }; struct io_uring_params { uint32_t sq_entries; uint32_t cq_entries; uint32_t flags; uint32_t sq_thread_cpu; uint32_t sq_thread_idle; uint32_t features; uint32_t resv[4]; struct io_sqring_offsets sq_off; struct io_cqring_offsets cq_off; }; #define IORING_OFF_SQ_RING 0 #define IORING_OFF_SQES 0x10000000ULL #define IORING_SETUP_SQE128 (1U << 10) #define IORING_SETUP_CQE32 (1U << 11) static long syz_io_uring_setup(volatile long a0, volatile long a1, volatile long a2, volatile long a3) { uint32_t entries = (uint32_t)a0; struct io_uring_params* setup_params = (struct io_uring_params*)a1; void** ring_ptr_out = (void**)a2; void** sqes_ptr_out = (void**)a3; setup_params->flags &= ~(IORING_SETUP_CQE32 | IORING_SETUP_SQE128); uint32_t fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params); uint32_t sq_ring_sz = setup_params->sq_off.array + setup_params->sq_entries * sizeof(uint32_t); uint32_t cq_ring_sz = setup_params->cq_off.cqes + setup_params->cq_entries * SIZEOF_IO_URING_CQE; uint32_t ring_sz = sq_ring_sz > cq_ring_sz ? sq_ring_sz : cq_ring_sz; *ring_ptr_out = mmap(0, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQ_RING); uint32_t sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE; *sqes_ptr_out = mmap(0, sqes_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQES); uint32_t* array = (uint32_t*)((uintptr_t)*ring_ptr_out + setup_params->sq_off.array); for (uint32_t index = 0; index < entries; index++) array[index] = index; return fd_io_uring; } //% This code is derived from puff.{c,h}, found in the zlib development. The //% original files come with the following copyright notice: //% Copyright (C) 2002-2013 Mark Adler, all rights reserved //% version 2.3, 21 Jan 2013 //% This software is provided 'as-is', without any express or implied //% warranty. In no event will the author be held liable for any damages //% arising from the use of this software. //% Permission is granted to anyone to use this software for any purpose, //% including commercial applications, and to alter it and redistribute it //% freely, subject to the following restrictions: //% 1. The origin of this software must not be misrepresented; you must not //% claim that you wrote the original software. If you use this software //% in a product, an acknowledgment in the product documentation would be //% appreciated but is not required. //% 2. Altered source versions must be plainly marked as such, and must not be //% misrepresented as being the original software. //% 3. This notice may not be removed or altered from any source distribution. //% Mark Adler madler@alumni.caltech.edu //% BEGIN CODE DERIVED FROM puff.{c,h} #define MAXBITS 15 #define MAXLCODES 286 #define MAXDCODES 30 #define MAXCODES (MAXLCODES + MAXDCODES) #define FIXLCODES 288 struct puff_state { unsigned char* out; unsigned long outlen; unsigned long outcnt; const unsigned char* in; unsigned long inlen; unsigned long incnt; int bitbuf; int bitcnt; jmp_buf env; }; static int puff_bits(struct puff_state* s, int need) { long val = s->bitbuf; while (s->bitcnt < need) { if (s->incnt == s->inlen) longjmp(s->env, 1); val |= (long)(s->in[s->incnt++]) << s->bitcnt; s->bitcnt += 8; } s->bitbuf = (int)(val >> need); s->bitcnt -= need; return (int)(val & ((1L << need) - 1)); } static int puff_stored(struct puff_state* s) { s->bitbuf = 0; s->bitcnt = 0; if (s->incnt + 4 > s->inlen) return 2; unsigned len = s->in[s->incnt++]; len |= s->in[s->incnt++] << 8; if (s->in[s->incnt++] != (~len & 0xff) || s->in[s->incnt++] != ((~len >> 8) & 0xff)) return -2; if (s->incnt + len > s->inlen) return 2; if (s->outcnt + len > s->outlen) return 1; for (; len--; s->outcnt++, s->incnt++) { if (s->in[s->incnt]) s->out[s->outcnt] = s->in[s->incnt]; } return 0; } struct puff_huffman { short* count; short* symbol; }; static int puff_decode(struct puff_state* s, const struct puff_huffman* h) { int first = 0; int index = 0; int bitbuf = s->bitbuf; int left = s->bitcnt; int code = first = index = 0; int len = 1; short* next = h->count + 1; while (1) { while (left--) { code |= bitbuf & 1; bitbuf >>= 1; int count = *next++; if (code - count < first) { s->bitbuf = bitbuf; s->bitcnt = (s->bitcnt - len) & 7; return h->symbol[index + (code - first)]; } index += count; first += count; first <<= 1; code <<= 1; len++; } left = (MAXBITS + 1) - len; if (left == 0) break; if (s->incnt == s->inlen) longjmp(s->env, 1); bitbuf = s->in[s->incnt++]; if (left > 8) left = 8; } return -10; } static int puff_construct(struct puff_huffman* h, const short* length, int n) { int len; for (len = 0; len <= MAXBITS; len++) h->count[len] = 0; int symbol; for (symbol = 0; symbol < n; symbol++) (h->count[length[symbol]])++; if (h->count[0] == n) return 0; int left = 1; for (len = 1; len <= MAXBITS; len++) { left <<= 1; left -= h->count[len]; if (left < 0) return left; } short offs[MAXBITS + 1]; offs[1] = 0; for (len = 1; len < MAXBITS; len++) offs[len + 1] = offs[len] + h->count[len]; for (symbol = 0; symbol < n; symbol++) if (length[symbol] != 0) h->symbol[offs[length[symbol]]++] = symbol; return left; } static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode, const struct puff_huffman* distcode) { static const short lens[29] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258}; static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0}; static const short dists[30] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577}; static const short dext[30] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13}; int symbol; do { symbol = puff_decode(s, lencode); if (symbol < 0) return symbol; if (symbol < 256) { if (s->outcnt == s->outlen) return 1; if (symbol) s->out[s->outcnt] = symbol; s->outcnt++; } else if (symbol > 256) { symbol -= 257; if (symbol >= 29) return -10; int len = lens[symbol] + puff_bits(s, lext[symbol]); symbol = puff_decode(s, distcode); if (symbol < 0) return symbol; unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]); if (dist > s->outcnt) return -11; if (s->outcnt + len > s->outlen) return 1; while (len--) { if (dist <= s->outcnt && s->out[s->outcnt - dist]) s->out[s->outcnt] = s->out[s->outcnt - dist]; s->outcnt++; } } } while (symbol != 256); return 0; } static int puff_fixed(struct puff_state* s) { static int virgin = 1; static short lencnt[MAXBITS + 1], lensym[FIXLCODES]; static short distcnt[MAXBITS + 1], distsym[MAXDCODES]; static struct puff_huffman lencode, distcode; if (virgin) { lencode.count = lencnt; lencode.symbol = lensym; distcode.count = distcnt; distcode.symbol = distsym; short lengths[FIXLCODES]; int symbol; for (symbol = 0; symbol < 144; symbol++) lengths[symbol] = 8; for (; symbol < 256; symbol++) lengths[symbol] = 9; for (; symbol < 280; symbol++) lengths[symbol] = 7; for (; symbol < FIXLCODES; symbol++) lengths[symbol] = 8; puff_construct(&lencode, lengths, FIXLCODES); for (symbol = 0; symbol < MAXDCODES; symbol++) lengths[symbol] = 5; puff_construct(&distcode, lengths, MAXDCODES); virgin = 0; } return puff_codes(s, &lencode, &distcode); } static int puff_dynamic(struct puff_state* s) { static const short order[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; int nlen = puff_bits(s, 5) + 257; int ndist = puff_bits(s, 5) + 1; int ncode = puff_bits(s, 4) + 4; if (nlen > MAXLCODES || ndist > MAXDCODES) return -3; short lengths[MAXCODES]; int index; for (index = 0; index < ncode; index++) lengths[order[index]] = puff_bits(s, 3); for (; index < 19; index++) lengths[order[index]] = 0; short lencnt[MAXBITS + 1], lensym[MAXLCODES]; struct puff_huffman lencode = {lencnt, lensym}; int err = puff_construct(&lencode, lengths, 19); if (err != 0) return -4; index = 0; while (index < nlen + ndist) { int symbol; int len; symbol = puff_decode(s, &lencode); if (symbol < 0) return symbol; if (symbol < 16) lengths[index++] = symbol; else { len = 0; if (symbol == 16) { if (index == 0) return -5; len = lengths[index - 1]; symbol = 3 + puff_bits(s, 2); } else if (symbol == 17) symbol = 3 + puff_bits(s, 3); else symbol = 11 + puff_bits(s, 7); if (index + symbol > nlen + ndist) return -6; while (symbol--) lengths[index++] = len; } } if (lengths[256] == 0) return -9; err = puff_construct(&lencode, lengths, nlen); if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1])) return -7; short distcnt[MAXBITS + 1], distsym[MAXDCODES]; struct puff_huffman distcode = {distcnt, distsym}; err = puff_construct(&distcode, lengths + nlen, ndist); if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1])) return -8; return puff_codes(s, &lencode, &distcode); } static int puff(unsigned char* dest, unsigned long* destlen, const unsigned char* source, unsigned long sourcelen) { struct puff_state s = { .out = dest, .outlen = *destlen, .outcnt = 0, .in = source, .inlen = sourcelen, .incnt = 0, .bitbuf = 0, .bitcnt = 0, }; int err; if (setjmp(s.env) != 0) err = 2; else { int last; do { last = puff_bits(&s, 1); int type = puff_bits(&s, 2); err = type == 0 ? puff_stored(&s) : (type == 1 ? puff_fixed(&s) : (type == 2 ? puff_dynamic(&s) : -1)); if (err != 0) break; } while (!last); } *destlen = s.outcnt; return err; } //% END CODE DERIVED FROM puff.{c,h} #define ZLIB_HEADER_WIDTH 2 static int puff_zlib_to_file(const unsigned char* source, unsigned long sourcelen, int dest_fd) { if (sourcelen < ZLIB_HEADER_WIDTH) return 0; source += ZLIB_HEADER_WIDTH; sourcelen -= ZLIB_HEADER_WIDTH; const unsigned long max_destlen = 132 << 20; void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0); if (ret == MAP_FAILED) return -1; unsigned char* dest = (unsigned char*)ret; unsigned long destlen = max_destlen; int err = puff(dest, &destlen, source, sourcelen); if (err) { munmap(dest, max_destlen); errno = -err; return -1; } if (write(dest_fd, dest, destlen) != (ssize_t)destlen) { munmap(dest, max_destlen); return -1; } return munmap(dest, max_destlen); } static int setup_loop_device(unsigned char* data, unsigned long size, const char* loopname, int* loopfd_p) { int err = 0, loopfd = -1; int memfd = syscall(__NR_memfd_create, "syzkaller", 0); if (memfd == -1) { err = errno; goto error; } if (puff_zlib_to_file(data, size, memfd)) { err = errno; goto error_close_memfd; } loopfd = open(loopname, O_RDWR); if (loopfd == -1) { err = errno; goto error_close_memfd; } if (ioctl(loopfd, LOOP_SET_FD, memfd)) { if (errno != EBUSY) { err = errno; goto error_close_loop; } ioctl(loopfd, LOOP_CLR_FD, 0); usleep(1000); if (ioctl(loopfd, LOOP_SET_FD, memfd)) { err = errno; goto error_close_loop; } } close(memfd); *loopfd_p = loopfd; return 0; error_close_loop: close(loopfd); error_close_memfd: close(memfd); error: errno = err; return -1; } static void reset_loop_device(const char* loopname) { int loopfd = open(loopname, O_RDWR); if (loopfd == -1) { return; } if (ioctl(loopfd, LOOP_CLR_FD, 0)) { } close(loopfd); } static long syz_mount_image(volatile long fsarg, volatile long dir, volatile long flags, volatile long optsarg, volatile long change_dir, volatile unsigned long size, volatile long image) { unsigned char* data = (unsigned char*)image; int res = -1, err = 0, need_loop_device = !!size; char* mount_opts = (char*)optsarg; char* target = (char*)dir; char* fs = (char*)fsarg; char* source = NULL; char loopname[64]; if (need_loop_device) { int loopfd; memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(data, size, loopname, &loopfd) == -1) return -1; close(loopfd); source = loopname; } mkdir(target, 0777); char opts[256]; memset(opts, 0, sizeof(opts)); if (strlen(mount_opts) > (sizeof(opts) - 32)) { } strncpy(opts, mount_opts, sizeof(opts) - 32); if (strcmp(fs, "iso9660") == 0) { flags |= MS_RDONLY; } else if (strncmp(fs, "ext", 3) == 0) { bool has_remount_ro = false; char* remount_ro_start = strstr(opts, "errors=remount-ro"); if (remount_ro_start != NULL) { char after = *(remount_ro_start + strlen("errors=remount-ro")); char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1); has_remount_ro = ((before == '\0' || before == ',') && (after == '\0' || after == ',')); } if (strstr(opts, "errors=panic") || !has_remount_ro) strcat(opts, ",errors=continue"); } else if (strcmp(fs, "xfs") == 0) { strcat(opts, ",nouuid"); } res = mount(source, target, fs, flags, opts); if (res == -1) { err = errno; goto error_clear_loop; } res = open(target, O_RDONLY | O_DIRECTORY); if (res == -1) { err = errno; goto error_clear_loop; } if (change_dir) { res = chdir(target); if (res == -1) { err = errno; } } error_clear_loop: if (need_loop_device) reset_loop_device(loopname); errno = err; return res; } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } static void reset_loop() { char buf[64]; snprintf(buf, sizeof(buf), "/dev/loop%llu", procid); int loopfd = open(buf, O_RDWR); if (loopfd != -1) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } NONFAILING(memcpy((void*)0x400000000100, "hfs\000", 4)); NONFAILING(memcpy((void*)0x400000000900, "./file1\000", 8)); NONFAILING(memcpy( (void*)0x400000000a80, "\x74\x79\x70\x65\x3d\x70\x43\x51\x85\x2c\x63\x6f\x64\x65\x70\x61\x67\x65" "\x3d\x63\x70\x38\x36\x33\x2c\x00\x00\x00\x00\x74\x6f\x72\x3d\xb8\x4f\x84" "\x24\x68\xf8\xc5\x56\x8b\xcf\x21\xa3\x04\xfe\xe0\xa3\x39\x57\x2c\x64\x69" "\x72\x5f\x75\x6d\x61\x73\x6b\x3d\x30\x30\x30\x30\x30\x30\x30\x31\x30\x30" "\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x31\x30\x00", 87)); NONFAILING(memcpy( (void*)0x400000000200, "\x78\x9c\xec\xdd\xcb\x6e\xd3\x4a\x1c\xc7\xf1\xdf\x38\x49\x9b\x5e\xd4\xe3" "\x5e\x8e\x8e\x74\x36\xe7\xa8\x50\x09\x36\x15\x05\x16\x88\x4d\x10\xca\x96" "\x3d\x2b\x04\x34\xa9\x54\x11\x15\xd1\x16\x09\xd8\x90\x22\x96\x88\x07\x60" "\xcf\x2b\xf0\x10\x6c\x40\xbc\x00\xac\x58\xf1\x00\xdd\x19\xcd\x78\x72\x71" "\xe2\x38\xad\x68\x6c\x52\xbe\x1f\x29\x91\x33\x9e\x19\xff\xad\xf1\xc4\xf3" "\x0f\xa2\x16\x80\x3f\xd6\xed\xfa\xd7\xf7\xd7\xbe\xdb\x97\x91\x4a\x2a\x49" "\xba\x29\x05\x92\xaa\x52\x59\x72\x25\xd6\x61\xab\xd9\xc8\xea\xa8\xe4\x5a" "\xd8\x97\x51\xdc\xd2\x0c\xd5\xd9\xde\x6b\xa6\x35\xb5\xed\x5c\x0b\x2f\xb4" "\x9f\xca\x5a\xec\x2f\xc3\x64\x44\x51\x74\xeb\x5b\xd1\x41\xa0\x70\xa6\x37" "\xd3\x13\x02\x69\xd6\xcf\x43\xb7\xbf\x9a\x73\x5c\x93\xd2\x96\xfe\x2b\x3a" "\x86\xbc\xf5\x0f\xb0\x39\xd6\xb1\x9e\x69\xb6\xc0\x70\x00\x00\xbf\x01\x7f" "\xff\x0f\xfc\x6d\x62\xd1\x15\x19\x05\x81\xb4\xe1\x6f\xfb\xe7\xea\xfe\x7f" "\x5c\x74\x00\x67\xeb\x7a\x6b\xa8\x28\xca\x6c\xe0\xef\xff\x4b\x9d\xcc\x2b" "\x32\x76\x7c\xff\x72\xbb\xaa\x4f\xf7\x0e\x77\x5d\xbe\xe7\x52\x38\xbb\x3f" "\xe8\x64\x89\x27\x09\xa6\x32\xf0\x79\x46\xf1\x95\x95\x58\x60\xf6\x1d\x25" "\x9d\x8b\x25\x98\xdb\xd9\x2d\x6b\x73\xfb\x48\x8d\x40\xaf\x54\xf3\xfa\x72" "\xcb\x35\xf7\xde\x88\x2f\xdd\x8e\x31\xd1\xae\x0f\xe6\xa6\xa6\x9d\x75\x3e" "\xa3\x7b\xab\xe8\xce\x7c\xdc\x81\x5b\x51\x0e\xea\x84\xb4\xb3\xdb\x6a\xba" "\x95\x56\x37\xfe\x9e\xd5\xd3\x1d\xf1\xd7\x99\x8f\xe6\xb3\xb9\x67\x42\xbd" "\x53\x43\x4b\x7e\x50\xca\x91\xb1\xc3\xe4\x46\x2a\x1c\x18\xa9\xa0\x62\xe3" "\xbf\x32\xba\xc7\x05\xd7\xca\xd6\x92\x4f\xfb\x6b\xb5\x5a\x90\xa8\xb2\xec" "\x0e\xf2\xaf\x3f\x82\x37\xe6\x2c\xab\xe9\x19\x89\x3a\x57\xd4\x72\xef\x47" "\x83\x76\x37\x82\xac\x38\x5d\xab\x15\x25\x7f\x56\x88\xcf\x6e\x6b\x4c\xab" "\xd5\xb4\x56\x61\xf7\xd3\x88\x56\x6b\x89\x56\x25\x7f\x25\x6c\x6e\x3f\x6e" "\x65\xfe\x94\x32\x19\x9d\x53\x34\x6f\xcd\x5d\xb3\xae\x1f\xfa\xa0\xba\x9b" "\xff\xb1\xc0\xc6\xb7\xa1\x93\xcc\x4c\x5b\xc7\xd5\xf4\x57\x46\x7c\x3e\x33" "\xe9\x35\xcb\xae\x66\x38\x74\xe7\xe8\x4d\x97\xff\xbb\x11\x78\x24\x25\x39" "\x78\xa3\x87\xba\xa1\xa5\x83\xe7\x2f\x1e\x95\x5a\xad\xe6\xbe\xdd\x78\x90" "\xb2\xf1\x64\x71\xdf\xf8\x92\xca\x6b\x29\xb5\xce\xe4\x37\x4a\xca\xa8\xa3" "\x76\xaf\x24\xb2\x5e\x46\xd1\x49\x7b\x8e\x26\x19\xfc\xe5\x33\xed\xd0\x7e" "\x7f\x74\x4b\xec\xf4\x39\xf2\x43\xd9\x5f\xd9\xce\xb2\x6e\xab\x20\xb7\x61" "\x32\x03\x61\x9c\xf3\x8d\xfa\x27\x65\x5d\x90\xd3\xb3\x11\x45\xd2\x88\x5d" "\x05\x7f\x3f\x21\x17\x07\xa6\x33\xe8\xbe\x60\xae\xe0\x80\x90\x37\xbb\xee" "\x32\x71\xfe\xe7\x56\xf2\xf1\xaa\x2e\x5e\xce\xd9\xef\xf5\x30\x63\x9d\x9e" "\x9d\x64\x2a\xd1\xe3\x56\x37\x83\x4b\x2e\x05\x57\xdc\xfb\xfc\xa9\x32\xb8" "\x85\x94\x7f\x5d\x1c\x3e\xe2\xd5\x44\xce\xd8\xe3\x72\xae\x0b\x97\xa4\x8b" "\x7d\x85\x46\x99\x47\x0c\x7d\x9c\xe7\x84\xa9\xeb\x8b\xee\xf7\xad\xff\x01" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x30\x15\xf2\xf8" "\x9f\x06\x45\x9f\x23\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\xd3\x6e\xec\xf3\x7f\xff\xd6\x3f\x43\xcf\x83\x49\xfb\x1b" "\xf1\xee\xf9\xbf\x21\xcf\xff\x05\xa6\xc8\xcf\x00\x00\x00\xff\xff\x53\xe3" "\x73\x44", 740)); NONFAILING( syz_mount_image(/*fs=*/0x400000000100, /*dir=*/0x400000000900, /*flags=MS_SYNCHRONOUS|MS_RELATIME|MS_MANDLOCK*/ 0x200050, /*opts=*/0x400000000a80, /*chdir=*/1, /*size=*/0x2e4, /*img=*/0x400000000200)); NONFAILING(memcpy((void*)0x400000000180, "vfat\000", 5)); NONFAILING( memcpy((void*)0x400000000040, "\023\023w\305\3745\324\024T\325\324\035)\255\032`)" "Y\201F\346\276\026nA\255\r\275@T\003<\2373\273\332\202$" "\242\363\327r\347cnH\263<\277p\203r\350\361\271\223>" "\305\022wC\276\"\006 \236\360-\371\313\362\366\350\200\3238/\000", 78)); NONFAILING(syz_mount_image( /*fs=*/0x400000000180, /*dir=*/0x400000000040, /*flags=MS_I_VERSION|MS_UNBINDABLE|MS_SYNCHRONOUS|MS_RDONLY|MS_NOSUID|0x2040*/ 0x822053, /*opts=*/0, /*chdir=*/0xfc, /*size=*/0, /*img=*/0x4000000000c0)); NONFAILING(memcpy((void*)0x400000000000, "./bus\000", 6)); syscall(__NR_open, /*file=*/0x400000000000ul, /*flags=O_NOFOLLOW|O_NOCTTY|O_NOATIME|O_CREAT|O_RDWR*/ 0x60142ul, /*mode=*/0ul); NONFAILING(memcpy((void*)0x400000000000, "./file0\000", 8)); syscall(__NR_mknod, /*file=*/0x400000000000ul, /*mode=*/0ul, /*dev=*/0x701); res = -1; NONFAILING(res = syz_io_uring_setup(/*entries=*/0x4b6, /*params=*/0, /*ring_ptr=*/0, /*sqes_ptr=*/0)); if (res != -1) r[0] = res; syscall(__NR_io_uring_register, /*fd=*/r[0], /*opcode=*/0ul, /*arg=*/0ul, /*nr_args=*/0ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x3ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x400000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x400001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; install_segv_handler(); loop(); return 0; }